The main phase transition of mica-supported phosphatidylcholine membranes

被引：75

作者：

Yang, J ^{[1
]}

Appleyard, J ^{[1
]}

机构：

[1] Univ Vermont, Dept Phys, Burlington, VT 05405 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2000年 / 104卷 / 34期

关键词：

D O I：

10.1021/jp001403o

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The phase behavior of mica-supported bilayers has been studied with a differential scanning calorimeter, owing to a significant increase of the substrate area resulting from chopping a piece of mica into a large number of microscopic chips. We have found that then are two main phase transitions for supported phosphatidylcholine bilayers, separated by about 2 degrees C, and that the lower transition temperature is about 2 degrees C higher than the main phase transition temperature of lamellar bilayers. Therefore, supported bilayers do have the essential feature of free-standing lipid bilayers. However, the double transitions and higher transition temperatures indicate that details of the main phase transition in lipid layers are highly sensitive to their surrounding environment.

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页码：8097 / 8100

页数：4

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